Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

D.C. Miffitt, A. Tortola, C.S. Sebor, R.L. Halliday
LuminationsFour vertices with three lights each. These can be switched by rotation the whole puzzle. These changed are used to play a number of different games.

join »login » Community